Victorian Whitby Jet Necklace Circa. 1880 British An extraordinary Whitby jet as the beads are highly polished. One would scream "french jet!" but they would be wrong. This is actually Whitby and confirmed by two Graduate Gemologists from GIA Newly re-strung. New clasp. 45 faceted shiny beads which graduate in size from 1/4 inch to 3/4 inch in diameter. The necklace is 30 inches long. New clasp marked "sterling" 96.0 gr. 61.4 dwt Fabulous!